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韓國纖維工學會誌 = Textile science and engineering v.41 no.6 = no.267, 2004년, pp.419 - 423  
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

전기방사용 PVDF/DMAc 용액계의 유변학적 특성
The Rheological Properties of the Solutions of PVDF in DMAc for Electrospinning

지병화    (한양대학교 응용화학공학부 고분자 구조제어 연구실   ); 김병철    (한양대학교 응용화학공학부 고분자 구조제어 연구실  );
  • 초록

    The solutions of polyvinylidene fluoride (PVDF) in dimethyl acetamide (DMAc) were rheologically investigated. In the dilute concentration regime, the solutions gave values of Huggins constant lower than 0.52, which decreased with increasing temperature. This suggests that DMAc is a good solvent and the solvating power is increased with increasing temperature. The solutions exhibited an inflection point on the log-log plot of $\eta_{sp}$ versus $(\eta)C$ . Further, the slope was slightly decreased with increasing temperature from 10 to $30^{\circ}C$ . At high concentrations, the solutions did not show lower Newtonian flow region. Further, raising temperature from 10 to $30^{\circ}C$ increased viscosity and yield stress of the solutions. Increasing concentration had the same effect on the rheological properties as increasing temperature. Relaxation time $(\lambda) $ increased as the concentration and temperature increased.


  • 주제어

    polyvinylidene fluoride .   dimethyl acetamide .   solution .   Huggins constant .   rheology .   yield stress.  

  • 참고문헌 (19)

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